The Only one that I found is the Clam shell, it was part of a gravel fill that was used in a parking lot that I was walking across to get a Coffee. The large Shell in the back ground was given to me by a good friend that has passed, it weighs about 8.5 LBS and comes from Brazil. The fish is out of Montana.
Yes those are great fossils. That ammonite is huge and those trilobites aren't small either. I have a few fossil fish from the Green River. Most of mine are from Wyoming.